Dimension Commands¶

Dimensions annotate your drawing with accurate measurements. All dimension commands use the active dimension style for appearance.

Command	Type	Description
DIMLIN	Linear	Horizontal or vertical distance
DIMALIGN	Aligned	True distance along an angled feature
DIMANG	Angular	Angle between two lines or three points
DIMRAD	Radius	Radius of an arc or circle
DIMDIA	Diameter	Diameter of an arc or circle
DIMJOG	Jogged Radius	Large radius with jogged leader
DIMOBL	Oblique	Set oblique angle on existing linear dimensions

DIMLIN (Linear Dimension)¶

Creates horizontal or vertical dimensions between two points or along a selected line entity.

Prompts¶

Prompt	Description
Specify start position	First measurement point
Specify end position	Second measurement point
Specify dimension line position	Position the dimension line

Keywords¶

Keyword	When available	Description
Entity	At start position	Dimension a line entity directly (auto-uses its endpoints)

How to Use (Two Points)¶

Command: DIMLIN
Specify start position [Entity]: (snap to left endpoint)
Specify end position: (snap to right endpoint)
Specify dimension line position: (click above the line)

How to Use (Entity Mode)¶

Command: DIMLIN
Specify start position [Entity]: Entity
Select the Entity: (click a line)
Specify dimension line position: (click to place)

The dimension automatically measures horizontal or vertical distance depending on cursor position relative to the measured points.

DIMALIGN (Aligned Dimension)¶

Creates a dimension aligned with the angle of the measured feature. Workflow is identical to DIMLIN, but the dimension line runs parallel to the measured points.

Prompts¶

Prompt	Description
Specify start position	First measurement point
Specify end position	Second measurement point
Specify dimension line position	Position the dimension line

Keywords¶

Keyword	When available	Description
Entity	At start position	Dimension a line entity directly

Command: DIMALIGN
Specify start position [Entity]: (snap to first point)
Specify end position: (snap to second point)
Specify dimension line position: (click to place)

DIMANG (Angular Dimension)¶

Measures the angle between two lines, or between three points (vertex, start, end).

Method 1: Two Lines¶

Command: DIMANG
Select line entity [Point]: (click first line)
Select line entity: (click second line)
Specify dimension line position: (click to place arc)

Method 2: Three Points¶

Command: DIMANG
Select line entity [Point]: Point
Pick angle point: (click the vertex)
Pick angle start point: (click first ray point)
Pick angle end point: (click second ray point)
Specify dimension line position: (click to place arc)

Keywords¶

Keyword	When available	Description
Point	At first entity selection	Switch to 3-point angular dimension

Tip

Click between the lines to dimension the included angle, or outside to dimension the reflex angle.

DIMRAD (Radius Dimension)¶

Measures the radius of an arc or circle with a leader pointing toward the center.

Prompts¶

Prompt	Description
Select the Entity	Pick an arc or circle
Specify dimension line position	Position the leader and text

Command: DIMRAD
Select the Entity: (click an arc or circle)
Specify dimension line position: (click to place)    --> "R25" displayed

The chord point follows the cursor along the arc/circle perimeter as you position the dimension.

DIMDIA (Diameter Dimension)¶

Measures the diameter of an arc or circle with a leader through the center.

Prompts¶

Prompt	Description
Select the Entity	Pick an arc or circle
Specify dimension line position	Position the leader and text

Command: DIMDIA
Select the Entity: (click a circle)
Specify dimension line position: (click to place)    --> "Ø50" displayed

DIMJOG (Jogged Radius Dimension)¶

Creates a jogged (shortened) radius dimension for large arcs/circles where the center is far from the geometry.

Prompts¶

Prompt	Description
Select the Entity	Pick an arc or circle
Specify first segment end position	End of the first radial segment (chord point on arc)
Specify Tail point1	First jog point
Specify Tail point2	Second jog/text point

Command: DIMJOG
Select the Entity: (click a large arc)
Specify first segment end position: (click on arc perimeter)
Specify Tail point1: (click jog location)
Specify Tail point2: (click text location)

DIMOBL (Oblique Dimension)¶

Sets an oblique angle on existing linear or aligned dimensions to tilt the extension lines.

Prompts¶

Prompt	Description
Select objects	Select one or more linear dimensions
Specify oblique angle	Angle to tilt extension lines (between -89° and 89°)

Command: DIMOBL
Select objects: (select linear dimensions, then Enter)
Specify oblique angle: 30

Note

DIMOBL only works on linear dimensions (DIMLIN and DIMALIGN entities). The oblique angle must be between -89° and 89°.

Dimension Style¶

All dimensions inherit appearance from the active dimension style:

Property	Controlled by style
Arrow type and size	Filled, open, tick, dot
Text height	Size of the measurement value
Precision	Number of decimal places
Units	Decimal, fractional, architectural
Extension lines	Color, offset, overshoot
Tolerances	Symmetric, deviation, limits

Set the style in the Format Panel dimension style dropdown before creating dimensions.

Best Practices¶

Practice	Benefit
Always snap to geometry points	Accurate measurements
Set dimension style before dimensioning	Consistent appearance
Place dimensions on a dedicated layer	Toggle visibility for prints
Use DIMLIN for horizontal/vertical	Use DIMALIGN for angled features
Use Entity mode for quick dimensioning	Fewer clicks per dimension
Use DIMJOG for large radii	Avoids long leaders to distant centers
Use DIMOBL for isometric views	Tilts extension lines to match projection

Quick Reference¶

Task	Command
Horizontal/vertical dimension	`DIMLIN` → two points → position
Aligned dimension	`DIMALIGN` → two points → position
Angular dimension	`DIMANG` → two lines → position
Radius dimension	`DIMRAD` → select arc/circle → position
Diameter dimension	`DIMDIA` → select arc/circle → position
Jogged radius	`DIMJOG` → select arc/circle → segment → tail points
Oblique extension lines	`DIMOBL` → select dims → angle
Dimension by entity	`DIMLIN` → `Entity` → click line → position